ulcerated tongue borders as a sign of amyloidosis in a patient with multiple myeloma

Amyloidosis is characterized by extracellular deposition of amyloid material in various tissues and organs. deposition of amyloid in the tongue is rare but often occurs in multiple myeloma. here we present the case of a 44-year-old woman under treatment for multiple myeloma who complained of lateral tongue pain. intraoral examination revealed an ill-defined, firm, whitish swelling with an ulcerated surface on the bilateral borders of the tongue. histopathological analysis revealed a lympho-mononuclear infiltration in the lamina propria with the presence of acellular and amorphous material positive for congo red staining. further examination revealed amyloidosis in a cervical mass associated with neural compression. thorough examination of the oral cavity in patients with multiple myeloma is critical for early detection of amyloidosis. a biopsy is mandatory to confirm the diagnosis, thereby facilitating intervention and management if necessary.